December 2025 – Page 19 – Kavli Institute Pre-Print Publications

SPHEREx Pre-Perihelion Mapping of $mathrmH_2O$, $mathrmCO_2$, and $mathrmCO$ in Interstellar Object 3I/ATLAS

Posted by klaurent December 8, 2025Caltech

Kavli Affiliate: James Bock | Summary:From 01- to 15-Aug-2025 UT, the SPHEREx spacecraft observed interstellar object 3I/ATLAS. Using $R = 40$-$130$ spectrophotometry at $λ= 0.7$-$5μ$m, light curves, spectra, and imaging of 3I were obtained. From these, robust detections of water gas emission at $2.7$-$2.8,μ$m and CO$_2$ gas at $4.23$-$4.27,μ$m plus tentative detections of $^13$CO$_2$ and […]

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Systematic bias due to eccentricity in parameter estimation for merging binary neutron stars : spinning case

Posted by klaurent December 8, 2025February 17, 2026Stanford

Kavli Affiliate: Hsiao-Mei (Sherry) Cho| First 5 Authors: [#item_custom_name[1, [#item_custom_name[2, [#item_custom_name[3, [#item_custom_name[4, [#item_custom_name[5| Summary:In our previous work [Phys. Rev. D bf 105. 124022 (2022)], we studied the impact of eccentricity on gravitational-wave parameter estimation for a nonspinning binary neutron star (BNS) system. We here extend the work to a more realistic case by including the […]

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PICKT: Practical Interlinked Concept Knowledge Tracing for Personalized Learning using Knowledge Map Concept Relations

Posted by klaurent December 8, 2025February 17, 2026Stanford

Kavli Affiliate: Hsiao-Mei (Sherry) Cho| First 5 Authors: [#item_custom_name[1, [#item_custom_name[2, [#item_custom_name[3, [#item_custom_name[4, [#item_custom_name[5| Summary:With the recent surge in personalized learning, Intelligent Tutoring Systems (ITS) that can accurately track students’ individual knowledge states and provide tailored learning paths based on this information are in demand as an essential task. This paper focuses on the core technology […]

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Learning decouples accuracy and reaction time for rapid decisions in a transitive inference task

Posted by dbos December 7, 2025January 5, 2026Columbia

Kavli Affiliate: Vincent Ferrera | Authors: Fabian A Munoz Silva, Greg Jensen, Maxwell Shinn, Yelda Alkan, John Murray, Herbert Terrace and Vincent P Ferrera | Summary: Transitive inference (TI) is a cognitive process in which decisions are guided by internal representations of abstract relationships. While the mechanisms underlying transitive learning have been well studied, the […]

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TOI-7166 b: A Habitable Zone mini-Neptune planet around a nearby low-mass star

Posted by klaurent December 7, 2025MIT

Kavli Affiliate: Avi Shporer | Summary:We present the discovery and validation of TOI-7166b, a 2.01+/-0.05R_Earth planet orbiting a nearby low-mass star. We validated the planet by combining TESS and multi-color high-precision photometric observations from ground-based telescopes, together with spectroscopic data, high-contrast imaging, archival images, and statistical arguments. The host star is an M4-type dwarf at […]

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Multicolour Validation of Two Temperate Mini-Neptunes Around M-dwarf Habitable Zones

Posted by klaurent December 7, 2025MIT

Kavli Affiliate: Avi Shporer | Summary:For small planets orbiting within the habitable zones of their host stars, multicolour validation via photometric transit observations offers an efficient alternative to prioritize targets before intensive radial-velocity follow-up, thereby expanding the sample of habitable-zone exoplanets amenable for atmospheric characterisation. In this study, we validate two exceptional habitable-zone TESS candidates, […]

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Multicolour Validation of Two Temperate Mini-Neptunes Around M-dwarf Habitable Zones

Posted by klaurent December 7, 2025MIT

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What Galaxy Clusters Have to Say About Dynamical Dark Energy and $H_0$

Posted by klaurent December 7, 2025Stanford

Kavli Affiliate: Eli Rykoff | Summary:We show that, in flat $Λ$CDM, low-redshift structure probes — cluster abundances, 3$times$2-point analyses, and full-shape clustering — are mutually consistent, jointly delivering precise constraints on $σ_8$ and $Ω_rm m$ that agree with geometrical datasets (CMB+BAO+SN). In $w_0w_a$CDM, adding clusters to the geometry dataset reduces the evidence for evolving dark […]

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A XRISM/Resolve view of the dynamics in the hot gaseous atmosphere of M87

Posted by klaurent December 6, 2025MIT

Kavli Affiliate: Eric Miller | Summary:The XRISM/Resolve microcalorimeter directly measured the gas velocities in the core of the Virgo Cluster, the closest example of AGN feedback in a cluster. This proximity allows us to resolve the kinematic impact of feedback on scales down to 5 kpc. Our spectral analysis reveals a high velocity dispersion of […]

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A Fully Photometric Approach to Type Ia Supernova Cosmology in the LSST Era: Host Galaxy Redshifts and Supernova Classification

Posted by klaurent December 6, 2025Chicago

Kavli Affiliate: Richard Kessler | Summary:The upcoming Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) is expected to discover nearly a million Type Ia supernovae (SNeIa), offering an unprecedented opportunity to constrain dark energy. The vast majority of these events will lack spectroscopic classification and redshifts, necessitating a fully photometric approach to […]

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